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Diffstat (limited to 'src/messages/MOSDPing.h')
| -rw-r--r-- | src/messages/MOSDPing.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/messages/MOSDPing.h b/src/messages/MOSDPing.h new file mode 100644 index 000000000..8f512a7d7 --- /dev/null +++ b/src/messages/MOSDPing.h @@ -0,0 +1,168 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net> + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + + +/** + * This is used to send pings between daemons (so far, the OSDs) for + * heartbeat purposes. We include a timestamp and distinguish between + * outgoing pings and responses to those. If you set the + * min_message in the constructor, the message will inflate itself + * to the specified size -- this is good for dealing with network + * issues with jumbo frames. See http://tracker.ceph.com/issues/20087 + * + */ + +#ifndef CEPH_MOSDPING_H +#define CEPH_MOSDPING_H + +#include "common/Clock.h" + +#include "msg/Message.h" +#include "osd/osd_types.h" + + +class MOSDPing final : public Message { +private: + static constexpr int HEAD_VERSION = 5; + static constexpr int COMPAT_VERSION = 4; + + public: + enum { + HEARTBEAT = 0, + START_HEARTBEAT = 1, + YOU_DIED = 2, + STOP_HEARTBEAT = 3, + PING = 4, + PING_REPLY = 5, + }; + const char *get_op_name(int op) const { + switch (op) { + case HEARTBEAT: return "heartbeat"; + case START_HEARTBEAT: return "start_heartbeat"; + case STOP_HEARTBEAT: return "stop_heartbeat"; + case YOU_DIED: return "you_died"; + case PING: return "ping"; + case PING_REPLY: return "ping_reply"; + default: return "???"; + } + } + + uuid_d fsid; + epoch_t map_epoch = 0; + __u8 op = 0; + utime_t ping_stamp; ///< when the PING was sent + ceph::signedspan mono_ping_stamp; ///< relative to sender's clock + ceph::signedspan mono_send_stamp; ///< replier's send stamp + std::optional<ceph::signedspan> delta_ub; ///< ping sender + epoch_t up_from = 0; + + uint32_t min_message_size = 0; + + MOSDPing(const uuid_d& f, epoch_t e, __u8 o, + utime_t s, + ceph::signedspan ms, + ceph::signedspan mss, + epoch_t upf, + uint32_t min_message, + std::optional<ceph::signedspan> delta_ub = {}) + : Message{MSG_OSD_PING, HEAD_VERSION, COMPAT_VERSION}, + fsid(f), map_epoch(e), op(o), + ping_stamp(s), + mono_ping_stamp(ms), + mono_send_stamp(mss), + delta_ub(delta_ub), + up_from(upf), + min_message_size(min_message) + { } + MOSDPing() + : Message{MSG_OSD_PING, HEAD_VERSION, COMPAT_VERSION} + {} +private: + ~MOSDPing() final {} + +public: + void decode_payload() override { + using ceph::decode; + auto p = payload.cbegin(); + decode(fsid, p); + decode(map_epoch, p); + decode(op, p); + decode(ping_stamp, p); + + int payload_mid_length = p.get_off(); + uint32_t size; + decode(size, p); + + if (header.version >= 5) { + decode(up_from, p); + decode(mono_ping_stamp, p); + decode(mono_send_stamp, p); + decode(delta_ub, p); + } + + p += size; + min_message_size = size + payload_mid_length; + } + void encode_payload(uint64_t features) override { + using ceph::encode; + encode(fsid, payload); + encode(map_epoch, payload); + encode(op, payload); + encode(ping_stamp, payload); + + size_t s = 0; + if (min_message_size > payload.length()) { + s = min_message_size - payload.length(); + } + encode((uint32_t)s, payload); + + encode(up_from, payload); + encode(mono_ping_stamp, payload); + encode(mono_send_stamp, payload); + encode(delta_ub, payload); + + if (s) { + // this should be big enough for normal min_message padding sizes. since + // we are targeting jumbo ethernet frames around 9000 bytes, 16k should + // be more than sufficient! the compiler will statically zero this so + // that at runtime we are only adding a bufferptr reference to it. + static char zeros[16384] = {}; + while (s > sizeof(zeros)) { + payload.append(ceph::buffer::create_static(sizeof(zeros), zeros)); + s -= sizeof(zeros); + } + if (s) { + payload.append(ceph::buffer::create_static(s, zeros)); + } + } + } + + std::string_view get_type_name() const override { return "osd_ping"; } + void print(std::ostream& out) const override { + out << "osd_ping(" << get_op_name(op) + << " e" << map_epoch + << " up_from " << up_from + << " ping_stamp " << ping_stamp << "/" << mono_ping_stamp + << " send_stamp " << mono_send_stamp; + if (delta_ub) { + out << " delta_ub " << *delta_ub; + } + out << ")"; + } +private: + template<class T, typename... Args> + friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args); +}; + +#endif |